1 // SPDX-License-Identifier: GPL-2.0+
3 * sunxi_emac.c -- Allwinner A10 ethernet driver
11 #include <dm/device_compat.h>
12 #include <linux/delay.h>
13 #include <linux/err.h>
18 #include <asm/arch/clock.h>
19 #include <power/regulator.h>
24 u32 tx_mode; /* 0x04 */
25 u32 tx_flow; /* 0x08 */
26 u32 tx_ctl0; /* 0x0c */
27 u32 tx_ctl1; /* 0x10 */
28 u32 tx_ins; /* 0x14 */
29 u32 tx_pl0; /* 0x18 */
30 u32 tx_pl1; /* 0x1c */
31 u32 tx_sta; /* 0x20 */
32 u32 tx_io_data; /* 0x24 */
33 u32 tx_io_data1;/* 0x28 */
34 u32 tx_tsvl0; /* 0x2c */
35 u32 tx_tsvh0; /* 0x30 */
36 u32 tx_tsvl1; /* 0x34 */
37 u32 tx_tsvh1; /* 0x38 */
38 u32 rx_ctl; /* 0x3c */
39 u32 rx_hash0; /* 0x40 */
40 u32 rx_hash1; /* 0x44 */
41 u32 rx_sta; /* 0x48 */
42 u32 rx_io_data; /* 0x4c */
43 u32 rx_fbc; /* 0x50 */
44 u32 int_ctl; /* 0x54 */
45 u32 int_sta; /* 0x58 */
46 u32 mac_ctl0; /* 0x5c */
47 u32 mac_ctl1; /* 0x60 */
48 u32 mac_ipgt; /* 0x64 */
49 u32 mac_ipgr; /* 0x68 */
50 u32 mac_clrt; /* 0x6c */
51 u32 mac_maxf; /* 0x70 */
52 u32 mac_supp; /* 0x74 */
53 u32 mac_test; /* 0x78 */
54 u32 mac_mcfg; /* 0x7c */
55 u32 mac_mcmd; /* 0x80 */
56 u32 mac_madr; /* 0x84 */
57 u32 mac_mwtd; /* 0x88 */
58 u32 mac_mrdd; /* 0x8c */
59 u32 mac_mind; /* 0x90 */
60 u32 mac_ssrr; /* 0x94 */
61 u32 mac_a0; /* 0x98 */
62 u32 mac_a1; /* 0x9c */
66 struct sunxi_sramc_regs {
71 /* 0: Disable 1: Aborted frame enable(default) */
72 #define EMAC_TX_AB_M (0x1 << 0)
73 /* 0: CPU 1: DMA(default) */
74 #define EMAC_TX_TM (0x1 << 1)
76 #define EMAC_TX_SETUP (0)
78 /* 0: DRQ asserted 1: DRQ automatically(default) */
79 #define EMAC_RX_DRQ_MODE (0x1 << 1)
80 /* 0: CPU 1: DMA(default) */
81 #define EMAC_RX_TM (0x1 << 2)
82 /* 0: Normal(default) 1: Pass all Frames */
83 #define EMAC_RX_PA (0x1 << 4)
84 /* 0: Normal(default) 1: Pass Control Frames */
85 #define EMAC_RX_PCF (0x1 << 5)
86 /* 0: Normal(default) 1: Pass Frames with CRC Error */
87 #define EMAC_RX_PCRCE (0x1 << 6)
88 /* 0: Normal(default) 1: Pass Frames with Length Error */
89 #define EMAC_RX_PLE (0x1 << 7)
90 /* 0: Normal 1: Pass Frames length out of range(default) */
91 #define EMAC_RX_POR (0x1 << 8)
92 /* 0: Not accept 1: Accept unicast Packets(default) */
93 #define EMAC_RX_UCAD (0x1 << 16)
94 /* 0: Normal(default) 1: DA Filtering */
95 #define EMAC_RX_DAF (0x1 << 17)
96 /* 0: Not accept 1: Accept multicast Packets(default) */
97 #define EMAC_RX_MCO (0x1 << 20)
98 /* 0: Disable(default) 1: Enable Hash filter */
99 #define EMAC_RX_MHF (0x1 << 21)
100 /* 0: Not accept 1: Accept Broadcast Packets(default) */
101 #define EMAC_RX_BCO (0x1 << 22)
102 /* 0: Disable(default) 1: Enable SA Filtering */
103 #define EMAC_RX_SAF (0x1 << 24)
104 /* 0: Normal(default) 1: Inverse Filtering */
105 #define EMAC_RX_SAIF (0x1 << 25)
107 #define EMAC_RX_SETUP (EMAC_RX_POR | EMAC_RX_UCAD | EMAC_RX_DAF | \
108 EMAC_RX_MCO | EMAC_RX_BCO)
110 /* 0: Disable 1: Enable Receive Flow Control(default) */
111 #define EMAC_MAC_CTL0_RFC (0x1 << 2)
112 /* 0: Disable 1: Enable Transmit Flow Control(default) */
113 #define EMAC_MAC_CTL0_TFC (0x1 << 3)
115 #define EMAC_MAC_CTL0_SETUP (EMAC_MAC_CTL0_RFC | EMAC_MAC_CTL0_TFC)
117 /* 0: Disable 1: Enable MAC Frame Length Checking(default) */
118 #define EMAC_MAC_CTL1_FLC (0x1 << 1)
119 /* 0: Disable(default) 1: Enable Huge Frame */
120 #define EMAC_MAC_CTL1_HF (0x1 << 2)
121 /* 0: Disable(default) 1: Enable MAC Delayed CRC */
122 #define EMAC_MAC_CTL1_DCRC (0x1 << 3)
123 /* 0: Disable 1: Enable MAC CRC(default) */
124 #define EMAC_MAC_CTL1_CRC (0x1 << 4)
125 /* 0: Disable 1: Enable MAC PAD Short frames(default) */
126 #define EMAC_MAC_CTL1_PC (0x1 << 5)
127 /* 0: Disable(default) 1: Enable MAC PAD Short frames and append CRC */
128 #define EMAC_MAC_CTL1_VC (0x1 << 6)
129 /* 0: Disable(default) 1: Enable MAC auto detect Short frames */
130 #define EMAC_MAC_CTL1_ADP (0x1 << 7)
131 /* 0: Disable(default) 1: Enable */
132 #define EMAC_MAC_CTL1_PRE (0x1 << 8)
133 /* 0: Disable(default) 1: Enable */
134 #define EMAC_MAC_CTL1_LPE (0x1 << 9)
135 /* 0: Disable(default) 1: Enable no back off */
136 #define EMAC_MAC_CTL1_NB (0x1 << 12)
137 /* 0: Disable(default) 1: Enable */
138 #define EMAC_MAC_CTL1_BNB (0x1 << 13)
139 /* 0: Disable(default) 1: Enable */
140 #define EMAC_MAC_CTL1_ED (0x1 << 14)
142 #define EMAC_MAC_CTL1_SETUP (EMAC_MAC_CTL1_FLC | EMAC_MAC_CTL1_CRC | \
145 #define EMAC_MAC_IPGT 0x15
147 #define EMAC_MAC_NBTB_IPG1 0xc
148 #define EMAC_MAC_NBTB_IPG2 0x12
150 #define EMAC_MAC_CW 0x37
151 #define EMAC_MAC_RM 0xf
153 #define EMAC_MAC_MFL 0x0600
156 #define EMAC_CRCERR (0x1 << 4)
157 #define EMAC_LENERR (0x3 << 5)
159 #define EMAC_RX_BUFSIZE 2000
161 struct emac_eth_dev {
162 struct emac_regs *regs;
165 struct phy_device *phydev;
167 uchar rx_buf[EMAC_RX_BUFSIZE];
168 struct udevice *phy_reg;
176 static void emac_inblk_32bit(void *reg, void *data, int count)
178 int cnt = (count + 3) >> 2;
190 static void emac_outblk_32bit(void *reg, void *data, int count)
192 int cnt = (count + 3) >> 2;
195 const u32 *buf = data;
203 /* Read a word from phyxcer */
204 static int emac_mdio_read(struct mii_dev *bus, int addr, int devad, int reg)
206 struct emac_eth_dev *priv = bus->priv;
207 struct emac_regs *regs = priv->regs;
209 /* issue the phy address and reg */
210 writel(addr << 8 | reg, ®s->mac_madr);
212 /* pull up the phy io line */
213 writel(0x1, ®s->mac_mcmd);
215 /* Wait read complete */
218 /* push down the phy io line */
219 writel(0x0, ®s->mac_mcmd);
222 return readl(®s->mac_mrdd);
225 /* Write a word to phyxcer */
226 static int emac_mdio_write(struct mii_dev *bus, int addr, int devad, int reg,
229 struct emac_eth_dev *priv = bus->priv;
230 struct emac_regs *regs = priv->regs;
232 /* issue the phy address and reg */
233 writel(addr << 8 | reg, ®s->mac_madr);
235 /* pull up the phy io line */
236 writel(0x1, ®s->mac_mcmd);
238 /* Wait write complete */
241 /* push down the phy io line */
242 writel(0x0, ®s->mac_mcmd);
245 writel(value, ®s->mac_mwtd);
250 static int sunxi_emac_init_phy(struct emac_eth_dev *priv, void *dev)
254 #ifdef CONFIG_PHY_ADDR
255 mask = CONFIG_PHY_ADDR;
258 priv->bus = mdio_alloc();
260 printf("Failed to allocate MDIO bus\n");
264 priv->bus->read = emac_mdio_read;
265 priv->bus->write = emac_mdio_write;
266 priv->bus->priv = priv;
267 strcpy(priv->bus->name, "emac");
269 ret = mdio_register(priv->bus);
273 priv->phydev = phy_connect(priv->bus, mask, dev, PHY_INTERFACE_MODE_MII);
277 phy_config(priv->phydev);
282 static void emac_setup(struct emac_eth_dev *priv)
284 struct emac_regs *regs = priv->regs;
288 writel(EMAC_TX_SETUP, ®s->tx_mode);
291 writel(EMAC_RX_SETUP, ®s->rx_ctl);
295 writel(EMAC_MAC_CTL0_SETUP, ®s->mac_ctl0);
299 if (priv->phydev->duplex == DUPLEX_FULL)
300 reg_val = (0x1 << 0);
301 writel(EMAC_MAC_CTL1_SETUP | reg_val, ®s->mac_ctl1);
304 writel(EMAC_MAC_IPGT, ®s->mac_ipgt);
307 writel(EMAC_MAC_NBTB_IPG2 | (EMAC_MAC_NBTB_IPG1 << 8), ®s->mac_ipgr);
309 /* Set up Collison window */
310 writel(EMAC_MAC_RM | (EMAC_MAC_CW << 8), ®s->mac_clrt);
312 /* Set up Max Frame Length */
313 writel(EMAC_MAC_MFL, ®s->mac_maxf);
316 static void emac_reset(struct emac_eth_dev *priv)
318 struct emac_regs *regs = priv->regs;
320 debug("resetting device\n");
323 writel(0, ®s->ctl);
326 writel(1, ®s->ctl);
330 static int _sunxi_write_hwaddr(struct emac_eth_dev *priv, u8 *enetaddr)
332 struct emac_regs *regs = priv->regs;
333 u32 enetaddr_lo, enetaddr_hi;
335 enetaddr_lo = enetaddr[2] | (enetaddr[1] << 8) | (enetaddr[0] << 16);
336 enetaddr_hi = enetaddr[5] | (enetaddr[4] << 8) | (enetaddr[3] << 16);
338 writel(enetaddr_hi, ®s->mac_a0);
339 writel(enetaddr_lo, ®s->mac_a1);
344 static int _sunxi_emac_eth_init(struct emac_eth_dev *priv, u8 *enetaddr)
346 struct emac_regs *regs = priv->regs;
352 setbits_le32(®s->rx_ctl, 0x8);
358 clrbits_le32(®s->mac_ctl0, 0x1 << 15);
360 /* Clear RX counter */
361 writel(0x0, ®s->rx_fbc);
367 _sunxi_write_hwaddr(priv, enetaddr);
374 ret = phy_startup(priv->phydev);
376 printf("Could not initialize PHY %s\n",
377 priv->phydev->dev->name);
381 /* Print link status only once */
382 if (!priv->link_printed) {
383 printf("ENET Speed is %d Mbps - %s duplex connection\n",
385 priv->phydev->duplex ? "FULL" : "HALF");
386 priv->link_printed = 1;
389 /* Set EMAC SPEED depend on PHY */
390 if (priv->phydev->speed == SPEED_100)
391 setbits_le32(®s->mac_supp, 1 << 8);
393 clrbits_le32(®s->mac_supp, 1 << 8);
395 /* Set duplex depend on phy */
396 if (priv->phydev->duplex == DUPLEX_FULL)
397 setbits_le32(®s->mac_ctl1, 1 << 0);
399 clrbits_le32(®s->mac_ctl1, 1 << 0);
402 setbits_le32(®s->ctl, 0x7);
407 static int _sunxi_emac_eth_recv(struct emac_eth_dev *priv, void *packet)
409 struct emac_regs *regs = priv->regs;
410 struct emac_rxhdr rxhdr;
417 /* Check packet ready or not */
419 /* Race warning: The first packet might arrive with
420 * the interrupts disabled, but the second will fix
422 rxcount = readl(®s->rx_fbc);
425 rxcount = readl(®s->rx_fbc);
430 reg_val = readl(®s->rx_io_data);
431 if (reg_val != 0x0143414d) {
433 clrbits_le32(®s->ctl, 0x1 << 2);
436 setbits_le32(®s->rx_ctl, 0x1 << 3);
437 while (readl(®s->rx_ctl) & (0x1 << 3))
441 setbits_le32(®s->ctl, 0x1 << 2);
446 /* A packet ready now
451 emac_inblk_32bit(®s->rx_io_data, &rxhdr, sizeof(rxhdr));
453 rx_len = rxhdr.rx_len;
454 rx_status = rxhdr.rx_status;
456 /* Packet Status check */
459 debug("RX: Bad Packet (runt)\n");
462 /* rx_status is identical to RSR register. */
463 if (0 & rx_status & (EMAC_CRCERR | EMAC_LENERR)) {
465 if (rx_status & EMAC_CRCERR)
466 printf("crc error\n");
467 if (rx_status & EMAC_LENERR)
468 printf("length error\n");
471 /* Move data from EMAC */
473 if (rx_len > EMAC_RX_BUFSIZE) {
474 printf("Received packet is too big (len=%d)\n", rx_len);
477 emac_inblk_32bit((void *)®s->rx_io_data, packet, rx_len);
481 return -EIO; /* Bad packet */
484 static int _sunxi_emac_eth_send(struct emac_eth_dev *priv, void *packet,
487 struct emac_regs *regs = priv->regs;
489 /* Select channel 0 */
490 writel(0, ®s->tx_ins);
493 emac_outblk_32bit((void *)®s->tx_io_data, packet, len);
496 writel(len, ®s->tx_pl0);
498 /* Start translate from fifo to phy */
499 setbits_le32(®s->tx_ctl0, 1);
504 static int sunxi_emac_board_setup(struct udevice *dev,
505 struct emac_eth_dev *priv)
507 struct sunxi_sramc_regs *sram =
508 (struct sunxi_sramc_regs *)SUNXI_SRAMC_BASE;
509 struct emac_regs *regs = priv->regs;
512 /* Map SRAM to EMAC */
513 setbits_le32(&sram->ctrl1, 0x5 << 2);
515 /* Set up clock gating */
516 ret = clk_enable(&priv->clk);
518 dev_err(dev, "failed to enable emac clock\n");
523 clrsetbits_le32(®s->mac_mcfg, 0xf << 2, 0xd << 2);
528 static int sunxi_emac_eth_start(struct udevice *dev)
530 struct eth_pdata *pdata = dev_get_plat(dev);
532 return _sunxi_emac_eth_init(dev_get_priv(dev), pdata->enetaddr);
535 static int sunxi_emac_eth_send(struct udevice *dev, void *packet, int length)
537 struct emac_eth_dev *priv = dev_get_priv(dev);
539 return _sunxi_emac_eth_send(priv, packet, length);
542 static int sunxi_emac_eth_recv(struct udevice *dev, int flags, uchar **packetp)
544 struct emac_eth_dev *priv = dev_get_priv(dev);
547 rx_len = _sunxi_emac_eth_recv(priv, priv->rx_buf);
548 *packetp = priv->rx_buf;
553 static void sunxi_emac_eth_stop(struct udevice *dev)
555 /* Nothing to do here */
558 static int sunxi_emac_eth_probe(struct udevice *dev)
560 struct eth_pdata *pdata = dev_get_plat(dev);
561 struct emac_eth_dev *priv = dev_get_priv(dev);
564 priv->regs = (struct emac_regs *)pdata->iobase;
566 ret = clk_get_by_index(dev, 0, &priv->clk);
568 dev_err(dev, "failed to get emac clock\n");
572 ret = sunxi_emac_board_setup(dev, priv);
577 regulator_set_enable(priv->phy_reg, true);
579 return sunxi_emac_init_phy(priv, dev);
582 static const struct eth_ops sunxi_emac_eth_ops = {
583 .start = sunxi_emac_eth_start,
584 .send = sunxi_emac_eth_send,
585 .recv = sunxi_emac_eth_recv,
586 .stop = sunxi_emac_eth_stop,
589 static int sunxi_emac_eth_of_to_plat(struct udevice *dev)
591 struct eth_pdata *pdata = dev_get_plat(dev);
592 struct emac_eth_dev *priv = dev_get_priv(dev);
593 struct ofnode_phandle_args args;
594 ofnode phy_node, mdio_node;
597 pdata->iobase = dev_read_addr(dev);
599 phy_node = dev_get_phy_node(dev);
600 if (!ofnode_valid(phy_node)) {
601 dev_err(dev, "failed to get PHY node\n");
605 * The PHY regulator is in the MDIO node, not the EMAC or PHY node.
606 * U-Boot does not have (and does not need) a device driver for the
607 * MDIO device, so just "pass through" that DT node to get to the
609 * The PHY regulator is optional, though: ignore if we cannot find
610 * a phy-supply property.
612 mdio_node = ofnode_get_parent(phy_node);
613 ret= ofnode_parse_phandle_with_args(mdio_node, "phy-supply", NULL, 0, 0,
615 if (ret && ret != -ENOENT) {
616 dev_err(dev, "failed to get PHY supply node\n");
620 ret = uclass_get_device_by_ofnode(UCLASS_REGULATOR, args.node,
623 dev_err(dev, "failed to get PHY regulator node\n");
631 static const struct udevice_id sunxi_emac_eth_ids[] = {
632 { .compatible = "allwinner,sun4i-a10-emac" },
636 U_BOOT_DRIVER(eth_sunxi_emac) = {
637 .name = "eth_sunxi_emac",
639 .of_match = sunxi_emac_eth_ids,
640 .of_to_plat = sunxi_emac_eth_of_to_plat,
641 .probe = sunxi_emac_eth_probe,
642 .ops = &sunxi_emac_eth_ops,
643 .priv_auto = sizeof(struct emac_eth_dev),
644 .plat_auto = sizeof(struct eth_pdata),